aux window - fix zoom when title bar prevents it

src/vs/workbench/browser/parts/editor/auxiliaryEditorPart.ts

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { onDidChangeFullscreen } from 'vs/base/browser/browser';
+import { onDidChangeFullscreen, onDidChangeZoomLevel } from 'vs/base/browser/browser';
 import { detectFullscreen, hide, show } from 'vs/base/browser/dom';
 import { Emitter, Event } from 'vs/base/common/event';
 import { DisposableStore } from 'vs/base/common/lifecycle';
@@ -113,6 +113,18 @@ export class AuxiliaryEditorPart {
 			titlebarPartVisible = true;
 
 			disposables.add(titlebarPart.onDidChange(() => updateEditorPartHeight(true)));
+			disposables.add(onDidChangeZoomLevel(targetWindowId => {
+				if (auxiliaryWindow.window.vscodeWindowId === targetWindowId && titlebarPartVisible) {
+
+					// This is a workaround for https://github.com/microsoft/vscode/issues/202377
+					// The title bar part prevents zooming in certain cases and when doing so,
+					// adjusts its size accordingly. This is however not reported from the
+					// `onDidchange` event that we listen to above, so we manually update the
+					// editor part height here.
+
+					updateEditorPartHeight(true);
+				}
+			}));
 
 			disposables.add(onDidChangeFullscreen(windowId => {
 				if (windowId !== auxiliaryWindow.window.vscodeWindowId) {

src/vs/workbench/browser/parts/titlebar/titlebarPart.ts

@@ -182,6 +182,7 @@ class TitlebarPartHoverDelegate implements IHoverDelegate {
 }
 
 export class BrowserTitlebarPart extends Part implements ITitlebarPart {
+
 	//#region IView
 
 	readonly minimumWidth: number = 0;
@@ -826,6 +827,7 @@ export class AuxiliaryBrowserTitlebarPart extends BrowserTitlebarPart implements
 	}
 
 	override get preventZoom(): boolean {
+
 		// Prevent zooming behavior if any of the following conditions are met:
 		// 1. Shrinking below the window control size (zoom < 1)
 		// 2. No custom items are present in the main title bar

src/vs/workbench/electron-sandbox/parts/titlebar/titlebarPart.ts

@@ -327,6 +327,7 @@ export class AuxiliaryNativeTitlebarPart extends NativeTitlebarPart implements I
 	}
 
 	override get preventZoom(): boolean {
+
 		// Prevent zooming behavior if any of the following conditions are met:
 		// 1. Shrinking below the window control size (zoom < 1)
 		// 2. No custom items are present in the main title bar